Mohammed Reda El Ouadi, and Abderrahim Hasbi. “HEGASIS: Hybrid, Energy Efficient Gathering in Sensor Information Systems”. International Journal of Advances in Scientific Research and Engineering (IJASRE), ISSN:2454-8006, DOI: 10.31695/IJASRE, vol. 4, no. 11, Nov. 2018, pp. 279-90, doi:10.31695/IJASRE.2018.32978.